A person who lacks basic attentiveness, indiscriminately oblivious to surroundings, who chronically blunders, forgets or overlooks things, usually through lack of foresight, planning or basic common sense and mental ineptitude. Implies that said individual's brain is permanently or impermanently zapped, or short-circuited into malfunction.

Yo! Emmanuel blew up his third microwave this year, after leaving the same spoon in his soup again.. What a Zap Head!